Java (III) conversion between basic types

Automatic type conversion: types with small capacity are automatically converted into data types with large capacity. The data types are sorted by capacity as follows:

Byte, short and char are not converted to each other. They are first converted to int type during calculation;

That is, when declared as the sum of B + C, m must be of type int;

When the value of any basic data type is connected with the string value (+), the value of the basic data type will be automatically converted to the string type;

The output is hello1, and anything enclosed in double quotes is a string type.

When it is necessary to convert a large capacity basic type to a small capacity data type, a forced conversion is required, for example:

Generally, the string type cannot be directly converted to the basic type, but the string can be converted to the basic type through the wrapper class corresponding to the basic type;

It should be noted that the value in the string must be convertible to other basic types.

Boolean types cannot be converted to other underlying data types.